CN110924910A - Mechanical accuracy measuring method for residual oil in water-drive starting blind end seam hole - Google Patents
Mechanical accuracy measuring method for residual oil in water-drive starting blind end seam hole Download PDFInfo
- Publication number
- CN110924910A CN110924910A CN201911175127.6A CN201911175127A CN110924910A CN 110924910 A CN110924910 A CN 110924910A CN 201911175127 A CN201911175127 A CN 201911175127A CN 110924910 A CN110924910 A CN 110924910A
- Authority
- CN
- China
- Prior art keywords
- water
- blind end
- residual oil
- end seam
- seam hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/02—Agriculture; Fishing; Mining
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/40—Controlling or monitoring, e.g. of flood or hurricane; Forecasting, e.g. risk assessment or mapping
Abstract
The invention discloses a mechanical accuracy measuring method for residual oil in a water-drive starting blind end seam hole. Firstly, basic physical property parameters and fracture-cavity structure parameters of crude oil and displacement water under the experimental temperature and pressure condition are counted and represented, then mechanical mechanism analysis is carried out, positive influence items and negative influence items influencing displacement of remaining oil in the blind end fracture-cavity are judged, a norm equation is established, then experiments are carried out, water drive starting norms of fractures with different flow rates and different opening degrees are measured and calculated, and a starting norm limit is obtained.
Description
Technical Field
The invention relates to the technical field of oil and gas field development, in particular to a mechanical accuracy measuring method for residual oil in a water-drive starting blind end seam hole.
Background
In the process of water drive development of the fracture-cavity oil reservoir, an obvious correlation exists between injection parameters and a swept range, and particularly, the improvement of the recovery ratio is directly influenced by the injection speed. Generally, the main displacement channel of the fracture-cavity reservoir has a good sweep effect, but the fracture sub-channel connected with the main channel has a poor sweep effect and has an obvious correlation with the injection speed. According to experience, when the flowing speed is too high or the opening degree of the crack is small, the lower crack is difficult to replace, therefore, a dimensionless norm is established based on the acting force relation, and the norm limit is determined by utilizing multiple physical experiments and theoretical norm calculation to guide the actual production.
Disclosure of Invention
The invention aims to provide a precision number experiment measurement method for residual oil in a blind end seam hole at the lower part of a water drive starting. Firstly, counting oil-water basic physical property parameters and fracture-cavity structure parameters, then carrying out mechanical mechanism analysis, judging positive influence items and negative influence items influencing displacement of residual oil in the blind end fracture-cavity, establishing a quasi-number equation, then carrying out experiments, and measuring and calculating water-drive starting quasi-numbers of fractures with different flow rates and different opening degrees to obtain a starting quasi-number limit.
In order to achieve the aim, the invention provides an experimental measurement method for the residual oil level of a water-drive starting lower blind end seam hole, which comprises the following steps:
step (1): counting oil-water basic physical property parameter data under the experimental condition;
step (2): characterizing structural parameters of the seam hole and constructing an experimental model;
and (3): analyzing a mechanical mechanism and constructing a quasi-number equation;
and (4): performing an experiment, and measuring a quasi-number limit of residual oil of the blind end seam hole which can be started by the water drive;
the specific operation of the step (1) is as follows: the oil-water basic physical property parameters under the experimental conditions are counted so as to calculate dimensionless standard numbers, and the physical quantities to be counted are as follows: oil-water density, oil-water interfacial tension and wetting angle.
The specific operation of the step (2) is as follows: and characterizing structural parameters of the fracture-cavity, including the height of a water flow channel above the fracture, the cross section area of the water flow channel at the opening of the fracture and the water flow.
The specific operation of the step (3) is as follows: analyzing the fluid flow mechanics mechanism, judging the relationship among gravity, wetting resistance and flow displacement force, and giving a quasi-number calculation formula.
The specific operation of the step (4) is as follows: and (3) constructing a physical model according to the parameters in the step (1) and the step (2) to perform a physical experiment, observing the maximum flow rate of the residual oil in the blind end seam hole driven by water drive under different opening degrees, and calculating the dimensionless criterion at the moment according to the step (3).
Drawings
FIG. 1 is a design of an experiment;
FIG. 2 shows the norm limits for different crack openings.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples to assist those skilled in the art in better understanding the present invention and enabling it to be practiced, which are not intended to limit the present invention.
The invention provides a mechanical accuracy measuring method for residual oil in a water-drive starting blind end seam hole, which comprises the following steps of:
the method comprises the following steps of (1) counting oil-water basic physical property parameters under experimental conditions so as to calculate dimensionless criterion, wherein the related physical quantities mainly comprise: oil-water density, oil-water interfacial tension and wetting angle. Wherein the oil phase density is 850kg/m3The density of the aqueous phase is 1000kg/m3The oil-water interfacial tension is 0.0017N/m and the wetting angle is 30 degrees.
And (2) characterizing structural parameters of the 2-seam-hole structure, including the height of a water flow channel above the seam, the cross section area of the water flow channel at the opening of the seam and the water flow. The physical model parameters used in the physical experiment are that the height of a water flow channel above a crack is 2cm, the opening of the crack is 1.5-4.5 mm, and the sectional area of the channel is 3.14cm2And the water flow is 5ml/min to 80 ml/min.
And (3) analyzing a fluid flow mechanics mechanism, judging the relation among gravity, wetting resistance and flow displacement force, and giving a quasi-number calculation formula.
According to the modelThe design diagram shows that the transverse direction of the fluid in the main flow direction is mainly used as a driving force and is reflected on the flow velocity of the aqueous phase method, namely Q/s, and the driving force is a reaction term of the displacement result; the longitudinal direction of the water phase displacement oil phase is mainly based on the buoyancy caused by density difference, namely (rho)w-ρo) gh, is the positive effect term of the displacement result; the wetting resistance of the fluid in the longitudinal direction by the fracture, i.e., σ · cos θ/r, is the counter-acting term to the displacement. According to the mechanical relationship, the force synthesis in the same direction is added to process the reaction term in the other direction, and the formula of the final quasi-number N is set as follows:
wherein l is a dimensionless parameter, and carrying out the next physical experiment according to a dimensionless criterion formula.
And (4) constructing a physical model according to the parameters in the step (1) and the step (2), carrying out a physical experiment with reference to the attached drawing 1, and observing the maximum flow rate of residual oil of the water-driven blind end seam hole under different opening degrees.
Through experiments, it can be found that (table 1), at the moment of finishing the displacement, residual oil in the karst cave connected with the crack with the opening of 1.5mm cannot be displaced, and water cannot enter the blind end crack to displace the residual oil. Compared with the crack opening of 3.5mm, the crack opening of 2.0mm increases the flow rate from 50ml/min to 80ml/min, and the residual oil in the crack displacement karst cave can not be entered.
By observing the displacement results under different opening degrees and different flow rates and combining with a norm calculation formula, the norm values under different states can be calculated, so that the norm limit of the water drive starting crack under different opening degrees is defined, and the formula is shown in table 1. In addition, quasi-numerical limits of water drive starting cracks with different opening degrees can be obtained through a fitting method, and the quasi-numerical limits are shown in fig. 2.
Table 1 data table of physical experiment results
The data thickened in the table is a quasi-numerical value when the maximum displacement speed of the residual oil capable of entering the blind end crack for displacement is observed.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (5)
1. The mechanical accuracy measuring method for the residual oil in the water-drive starting blind end seam hole comprises the following steps:
step (1): counting oil-water basic physical property parameter data under the experimental temperature and pressure conditions;
step (2): characterizing structural parameters of the required slot and constructing an experimental model;
and (3): analyzing a mechanical mechanism and constructing a quasi-number equation;
and (4): and (4) carrying out an experiment, and determining the accuracy limit of residual oil of the blind end seam hole which can be started by water flooding.
2. The experimental measurement method for the residual oil level of the water-drive starting lower blind end seam hole according to claim 1, is characterized in that: the specific operation of the step (1) is as follows: the oil-water basic physical property parameters are counted so as to calculate dimensionless standard numbers, and the physical quantities to be counted are as follows: oil-water density, oil-water interfacial tension and wetting angle.
3. The experimental measurement method for the residual oil level of the water-drive starting lower blind end seam hole according to claim 1, is characterized in that: the specific operation of the step (2) is as follows: and characterizing structural parameters of the fracture-cave, including the height of a water flow channel above the fracture, the cross section area of the water flow channel at the opening of the fracture and the water drive flow.
4. The experimental measurement method for the residual oil level of the water-drive starting lower blind end seam hole according to claim 1, is characterized in that: the specific operation of the step (3) is as follows: analyzing the fluid flow mechanics mechanism, judging the relationship among gravity, wetting resistance and flow displacement force, and giving a quasi-number calculation formula.
5. The experimental measurement method for the residual oil level of the water-drive starting lower blind end seam hole according to claim 1, is characterized in that: the specific operation of the step (4) is as follows: and (3) constructing a physical model according to the parameters in the step (1) and the step (2) to perform a physical experiment, observing the maximum flow rate of the residual oil of the water drive starting blind end seam hole under different opening degrees, and calculating the dimensionless criterion at the moment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911175127.6A CN110924910B (en) | 2019-11-26 | 2019-11-26 | Mechanical accuracy measuring method for residual oil in water-drive starting blind end seam hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911175127.6A CN110924910B (en) | 2019-11-26 | 2019-11-26 | Mechanical accuracy measuring method for residual oil in water-drive starting blind end seam hole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110924910A true CN110924910A (en) | 2020-03-27 |
| CN110924910B CN110924910B (en) | 2022-08-02 |
Family
ID=69851077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911175127.6A Active CN110924910B (en) | 2019-11-26 | 2019-11-26 | Mechanical accuracy measuring method for residual oil in water-drive starting blind end seam hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110924910B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1408056A1 (en) * | 1986-09-19 | 1988-07-07 | Московский Геологоразведочный Институт Им.Серго Орджоникидзе | Method of mining mineral deposits by underground leaching |
| CN105041277A (en) * | 2015-07-24 | 2015-11-11 | 中国石油化工股份有限公司石油勘探开发研究院 | Method for characterizing fracture-cavern type reservoir water-drive recovery effects |
| CN109948841A (en) * | 2019-03-11 | 2019-06-28 | 中国石油大学(华东) | A kind of prediction technique of the waterflooding development oil field remaining oil distribution based on deep learning |
| CN110263439A (en) * | 2019-06-21 | 2019-09-20 | 中国石油大学(华东) | Separate zone waterflooding technology policy demarcation line before a kind of oil reservoir water breakthrough |
-
2019
- 2019-11-26 CN CN201911175127.6A patent/CN110924910B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1408056A1 (en) * | 1986-09-19 | 1988-07-07 | Московский Геологоразведочный Институт Им.Серго Орджоникидзе | Method of mining mineral deposits by underground leaching |
| CN105041277A (en) * | 2015-07-24 | 2015-11-11 | 中国石油化工股份有限公司石油勘探开发研究院 | Method for characterizing fracture-cavern type reservoir water-drive recovery effects |
| CN109948841A (en) * | 2019-03-11 | 2019-06-28 | 中国石油大学(华东) | A kind of prediction technique of the waterflooding development oil field remaining oil distribution based on deep learning |
| CN110263439A (en) * | 2019-06-21 | 2019-09-20 | 中国石油大学(华东) | Separate zone waterflooding technology policy demarcation line before a kind of oil reservoir water breakthrough |
Non-Patent Citations (1)
| Title |
|---|
| 李刚柱: "缝洞型油藏注水开采机理研究", 《中国优秀硕士学位论文全文数据库（电子期刊）工程科技Ⅰ辑》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110924910B (en) | 2022-08-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106600442B (en) | Method for optimizing critical liquid carrying condition of deepwater gas well test | |
| CN104343445B (en) | The method for recognizing gas-bearing formation and water layer, high gas-oil ratio (HGOR) reservoir and gas saturation | |
| CN109596457B (en) | Pipe flow evaluation method of foaming agent for drainage and gas production | |
| CN105160071B (en) | A kind of suitable gas-liquid is the same as the method for discrimination of production horizontal well underground working | |
| RU2010130459A (en) | METHOD FOR CALCULATING THE RELATIONSHIP OF RELATIVE PERMEABILITIES OF FLUID FORMS OF FORMATION AND WETTABILITY OF A BOREHOLE FORMATION AND A TOOL FOR TESTING FORMATION TO IMPLEMENT THIS METHOD | |
| CN113626967B (en) | Fracture-cavity reservoir productivity determination method and system considering stress sensitivity | |
| CN110924910B (en) | Mechanical accuracy measuring method for residual oil in water-drive starting blind end seam hole | |
| CN111075428A (en) | Method for quickly judging time and depth of gas well shaft liquid accumulation | |
| CN112796725B (en) | Method and system for determining fracturing section gas production contribution rate of staged fracturing shale gas well | |
| CN110714757B (en) | Mechanical accuracy measurement method for residual oil of gas-drive starting blind end seam hole body | |
| CN107939367B (en) | A kind of pressure break water horse power determines method | |
| CN215064796U (en) | Hydrogeology is high-precision measurement scale pipe of flow weir for pumping test | |
| CN1094599C (en) | Inter-well tracing determination technology using chemical tracer | |
| CN103266870B (en) | A kind of determination method and system of oil-gas reservoir water blocking damage radius | |
| CN112161661B (en) | Debris flow measuring device of sand discharge pipeline and calibration method thereof | |
| CN111222227B (en) | Mine curve determining method and system | |
| Hanson et al. | Error analysis of flowmeter measurements | |
| CN106777574A (en) | Well head bottom pressure conversion method under the conditions of a kind of shale gas horizontal well two phase flow | |
| CN2697602Y (en) | Micro-quantity metering device for high water containing and low oil production | |
| RU2521091C1 (en) | Bubble-point pressure determination method | |
| CN106768121A (en) | Oil gas water three phase automatic gauge experimental provision | |
| US20240125969A1 (en) | Method for Experimentally Determining Critical Sand-Carrying Gas Velocity of Shale Gas Wells | |
| CN112523745B (en) | Low-yield shale gas reservoir production seeking device and method | |
| CN1218161C (en) | Wave height measuring method | |
| CN117988816A (en) | Downhole throttling gas well effusion diagnosis method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Jianguang Inventor after: Ge Jiao Inventor after: Wu Minglu Inventor after: Lv Aimin Inventor after: Zhao Jiannan Inventor after: Zhang Xu Inventor before: Ge Jiao Inventor before: Zhang Jianguang Inventor before: Wu Minglu Inventor before: Lv Aimin Inventor before: Zhao Jiannan Inventor before: Zhang Xu |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |